Ventilator-cap for street-lamps.



No. 662,3l3, V Patented Nov. 20, I900.

A. E. SHAW.

VENTILATDR CAP FOR STREET LAMPS.

(Applicatio n filed Apr. 21, 1900.;

(No Model.)

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ARTHUR E. SHAW, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PENNSYLVANIA GLOBE GAS LIGHT COMPANY, OF SAME PLACE.

VENTlLATOR C/AP FOR STREET LAMPS.

SPECIFICATION forming part of Letters Patent No. 662,313, dated November 20, 1900.

Application filed April 21, 1900. Seria'l No. 18,793. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR E. SHAW, a citizen of the United States, residing at Philadelphia, in the county of Philadelphiau and State of Pennsylvania, have invented a certain new and useful Ventilator-Cap forStreet- Lamps, of which the following is a specification. The object of this invention is to provide to a ventilator-cap for street-lamps, and more especially for incandescent street lamps, which shall present an attractive appearance and a simple structure and which shall efficiently exclude both water and drafts from r5 entering the lantern.

To this and other ends the invention consists of the improvements hereinafter described and claimed.

The nature, characteristic features, and

scope of the invention will be more fully un derstood from the following description, taken in connection with the accompanying drawings, forming part hereof, and in which Figure 1 is a side elevational View of a ven- 2 5 tilator-cap embodying features of the invention. Fig. 2 is a central sectional View of the same. Fig. 3 is a perspective View of one of the supports; and Fig. 4 is a side elevational View, on a greatly-reduced scale, illustrating a ventilator-cap in application to one form of street-lamp, which for the sake of illustration is an incandescent light.

To obtain the best commercial results in outdoor or street lighting, especially with in 5 candescent lights, it is necessary to provide the lamp with a ventilator-cap that will efficiently exclude water and at the same time prevent drafts from entering and endangering the mantle. To this end use is made of a circular band a, having supports 1), provided withinclined arms b and Z2 adapted to receive members 0 and (1. These members 0 and d are provided with flaring flanges e and f, corresponding to the inclination of the arms b and b of the support 17. Between the flanges and the circular band there is space which permits of an unobstructed passage for air upward and downward. As shown in the drawings, the member 0 is more or less helmet-shaped, and Water descending upon this member will run off onto the beveled flange e, where it will drop off onto the lower flange f, and thence down onto the dome of the lantern, where it will drain off to the ground, thus excluding all water from the interior of the lantern. As the arms of the supports correspond in inclination to the flanges, it follows that Water running down upon them will have the tendency to drain off from the band. This construction is neat and attractive in appearance and may be applied to all varieties of street-lamps now used without altering their construction and may be applied readily and conveniently.

It is simple in construction, inexpensive to manufacture, needs no adjusting, and will effectively exclude water from the interior of the lantern and prevent drafts from circulating in the interior.

It will be obvious to those skilled in the art to which the invention appertains that modifications may be made in details without departing from the spirit thereof. Hence I do not limit myself to the precise construction and arrangement of parts hereinabove set forth, and illustrated in the drawings, but,

Having thus described the nature and objects of the invention, what I claim as new, and desire to secure by Letters Patent, is-

A ventilator-cap consisting of a base memher, a dome member, supports each consist- I ing of a single piece and forming arms adapted to be secured to said base and dome members, and a band extending above and below the supports and secured to said supports and concealing the same, substantially as described.

In testimony wherof I have hereunto signed my name.

ARTHUR E. SHAW. 

